1
|
Wu D, Huang W, Zhang J, He L, Chen S, Zhu S, Sang Y, Liu K, Hou G, Chen B, Xu Y, Liu B, Yao H. Downregulation of VEGFA accelerates AGEs-mediated nucleus pulposus degeneration through inhibiting protective mitophagy in high glucose environments. Int J Biol Macromol 2024; 262:129950. [PMID: 38320636 DOI: 10.1016/j.ijbiomac.2024.129950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/24/2024] [Accepted: 02/01/2024] [Indexed: 02/08/2024]
Abstract
Intervertebral disc degeneration (IVDD) contributes largely to low back pain. Recent studies have highlighted the exacerbating role of diabetes mellitus (DM) in IVDD, mainly due to the influence of hyperglycemia (HG) or the accumulation of advanced glycation end products (AGEs). Vascular endothelial growth factor A (VEGFA) newly assumed a distinct impact in nonvascular tissues through mitophagy regulation. However, the combined actions of HG and AGEs on IVDD and the involved role of VEGFA remain unclear. We confirmed the potential relation between VEGFA and DM through bioinformatics and biological specimen detection. Then we observed that AGEs induced nucleus pulposus (NP) cell degeneration by upregulating cellular reactive oxygen species (ROS), and HG further aggravated ROS level through breaking AGEs-induced protective mitophagy. Furthermore, this adverse effect could be strengthened by VEGFA knockdown. Importantly, we identified that the regulation of VEGFA and mitophagy were vital mechanisms in AGEs-HG-induced NP cell degeneration through Parkin/Akt/mTOR and AMPK/mTOR pathway. Additionally, VEGFA overexpression through local injection with lentivirus carrying VEGFA plasmids significantly alleviated NP degeneration and IVDD in STZ-induced diabetes and puncture rat models. In conclusion, the findings first confirmed that VEGFA protects against AGEs-HG-induced IVDD, which may represent a therapeutic strategy for DM-related IVDD.
Collapse
Affiliation(s)
- Depeng Wu
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery, Guangzhou, PR China; Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery, Guangzhou, PR China
| | - Weijun Huang
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery, Guangzhou, PR China; Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery, Guangzhou, PR China
| | - Junbin Zhang
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Lei He
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery, Guangzhou, PR China; Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery, Guangzhou, PR China
| | - Siyu Chen
- Department of Neurosurgery/Neuro-oncology, Sun Yat-sen University Cancer Center, Guangzhou, PR China
| | - Sihan Zhu
- University Hospital, LMU Munich, 81377 Munich, Germany
| | - Yuan Sang
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Kaihua Liu
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Gang Hou
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Biying Chen
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Yichun Xu
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China
| | - Bin Liu
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China; Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery, Guangzhou, PR China; Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery, Guangzhou, PR China.
| | - Hui Yao
- Department of Orthopaedics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
| |
Collapse
|
2
|
Zhang X, Deng C, Qi S. Periosteum Containing Implicit Stem Cells: A Progressive Source of Inspiration for Bone Tissue Regeneration. Int J Mol Sci 2024; 25:2162. [PMID: 38396834 PMCID: PMC10889827 DOI: 10.3390/ijms25042162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/12/2024] [Accepted: 01/26/2024] [Indexed: 02/25/2024] Open
Abstract
The periosteum is known as the thin connective tissue covering most bone surfaces. Its extrusive bone regeneration capacity was confirmed from the very first century-old studies. Recently, pluripotent stem cells in the periosteum with unique physiological properties were unveiled. Existing in dynamic contexts and regulated by complex molecular networks, periosteal stem cells emerge as having strong capabilities of proliferation and multipotential differentiation. Through continuous exploration of studies, we are now starting to acquire more insight into the great potential of the periosteum in bone formation and repair in situ or ectopically. It is undeniable that the periosteum is developing further into a more promising strategy to be harnessed in bone tissue regeneration. Here, we summarized the development and structure of the periosteum, cell markers, and the biological features of periosteal stem cells. Then, we reviewed their pivotal role in bone repair and the underlying molecular regulation. The understanding of periosteum-related cellular and molecular content will help enhance future research efforts and application transformation of the periosteum.
Collapse
Affiliation(s)
- Xinyuan Zhang
- Department of Prosthodontics, Shanghai Stomatological Hospital, School of Stomatology, Fudan University, Shanghai 200001, China;
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai 200001, China
| | - Chen Deng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China;
| | - Shengcai Qi
- Department of Prosthodontics, Shanghai Stomatological Hospital, School of Stomatology, Fudan University, Shanghai 200001, China;
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai 200001, China
| |
Collapse
|
3
|
Sun X, Xu X, Yue X, Wang T, Wang Z, Zhang C, Wang J. Nanozymes With Osteochondral Regenerative Effects: An Overview of Mechanisms and Recent Applications. Adv Healthc Mater 2024; 13:e2301924. [PMID: 37633309 DOI: 10.1002/adhm.202301924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/14/2023] [Indexed: 08/28/2023]
Abstract
With the discovery of the intrinsic enzyme-like activity of metal oxides, nanozymes garner significant attention due to their superior characteristics, such as low cost, high stability, multi-enzyme activity, and facile preparation. Notably, in the field of biomedicine, nanozymes primarily focus on disease detection, antibacterial properties, antitumor effects, and treatment of inflammatory conditions. However, the potential for application in regenerative medicine, which primarily addresses wound healing, nerve defect repair, bone regeneration, and cardiovascular disease treatment, is garnering interest as well. This review introduces nanozymes as an innovative strategy within the realm of bone regenerative medicine. The primary focus of this approach lies in the facilitation of osteochondral regeneration through the modulation of the pathological microenvironment. The catalytic mechanisms of four types of representative nanozymes are first discussed. The pathological microenvironment inhibiting osteochondral regeneration, followed by summarizing the therapy mechanism of nanozymes to osteochondral regeneration barriers is introduced. Further, the therapeutic potential of nanozymes for bone diseases is included. To improve the therapeutic efficiency of nanozymes and facilitate their clinical translation, future potential applications in osteochondral diseases are also discussed and some significant challenges addressed.
Collapse
Affiliation(s)
- Xueheng Sun
- Department of Sport Rehabilitation, Shanghai University of Sport, Shanghai, 200438, China
| | - Xiang Xu
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Rd, Shanghai, 200011, China
| | - Xiaokun Yue
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Rd, Shanghai, 200011, China
| | - Tianchang Wang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Rd, Shanghai, 200011, China
| | - Zhaofei Wang
- Department of Orthopaedic Surgery, Shanghai ZhongYe Hospital, Genertec Universal Medical Group, Shanghai, 200941, China
| | - Changru Zhang
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Rd, Shanghai, 200011, China
- Institute of Translational Medicine, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai, 200240, China
| | - Jinwu Wang
- Department of Sport Rehabilitation, Shanghai University of Sport, Shanghai, 200438, China
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Rd, Shanghai, 200011, China
| |
Collapse
|
4
|
Chen MY, Zhao FL, Chu WL, Bai MR, Zhang DM. A review of tamoxifen administration regimen optimization for Cre/loxp system in mouse bone study. Biomed Pharmacother 2023; 165:115045. [PMID: 37379643 DOI: 10.1016/j.biopha.2023.115045] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/07/2023] [Accepted: 06/20/2023] [Indexed: 06/30/2023] Open
Abstract
Gene knockout is a technique routinely used in basic experimental research, particularly in mouse skeletal and developmental studies. Tamoxifen-induced Cre/loxp system is known for its temporal and spatial precision and commonly utilized by researchers. However, tamoxifen has been shown its side effects on affecting the phenotype of mouse bone directly. This review aimed to optimize tamoxifen administration regimens including its dosage and duration, to identify an optimal induction strategy that minimizes potential side effects while maintaining recombination efficacy. This study will help researchers in designing gene knockout experiments in bone when using tamoxifen.
Collapse
Affiliation(s)
- Ming-Yang Chen
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fu-Lin Zhao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wen-Lin Chu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ming-Ru Bai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - De-Mao Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Institute of Biomedical Engineering, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China.
| |
Collapse
|
5
|
Zheng XQ, Huang J, Lin JL, Song CL. Pathophysiological mechanism of acute bone loss after fracture. J Adv Res 2023; 49:63-80. [PMID: 36115662 PMCID: PMC10334135 DOI: 10.1016/j.jare.2022.08.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 07/29/2022] [Accepted: 08/31/2022] [Indexed: 10/14/2022] Open
Abstract
BACKGROUND Acute bone loss after fracture is associated with various effects on the complete recovery process and a risk of secondary fractures among patients. Studies have reported similarities in pathophysiological mechanisms involved in acute bone loss after fractures and osteoporosis. However, given the silence nature of bone loss and bone metabolism complexities, the actual underlying pathophysiological mechanisms have yet to be fully elucidated. AIM OF REVIEW To elaborate the latest findings in basic research with a focus on acute bone loss after fracture. To briefly highlight potential therapeutic targets and current representative drugs. To arouse researchers' attention and discussion on acute bone loss after fracture. KEY SCIENTIFIC CONCEPTS OF REVIEW Bone loss after fracture is associated with immobilization, mechanical unloading, blood supply damage, sympathetic nerve regulation, and crosstalk between musculoskeletals among other factors. Current treatment strategies rely on regulation of osteoblasts and osteoclasts, therefore, there is a need to elucidate on the underlying mechanisms of acute bone loss after fractures to inform the development of efficacious and safe drugs. In addition, attention should be paid towards ensuring long-term skeletal health.
Collapse
Affiliation(s)
- Xuan-Qi Zheng
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jie Huang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jia-Liang Lin
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Chun-Li Song
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, China.
| |
Collapse
|
6
|
Buettmann EG, DeNapoli RC, Abraham LB, Denisco JA, Lorenz MR, Friedman MA, Donahue HJ. Reambulation following hindlimb unloading attenuates disuse-induced changes in murine fracture healing. Bone 2023; 172:116748. [PMID: 37001629 DOI: 10.1016/j.bone.2023.116748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/18/2023] [Accepted: 03/21/2023] [Indexed: 03/31/2023]
Abstract
Patients with bone and muscle loss from prolonged disuse have higher risk of falls and subsequent fragility fractures. In addition, fracture patients with continued disuse and/or delayed physical rehabilitation have worse clinical outcomes compared to individuals with immediate weight-bearing activity following diaphyseal fracture. However, the effects of prior disuse followed by physical reambulation on fracture healing cellular processes and adjacent bone and skeletal muscle recovery post-injury remains poorly defined. To bridge this knowledge gap and inform future treatment and rehabilitation strategies for fractures, a preclinical model of fracture healing with a history of prior unloading with and without reambulation was employed. First, skeletally mature male and female C57BL/6J mice (18 weeks) underwent hindlimb unloading by tail suspension (HLU) for 3 weeks to induce significant bone and muscle loss modeling enhanced bone fragility. Next, mice had their right femur fractured by open surgical dissection (stabilized with 24-gauge pin). The, mice were randomly assigned to continued HLU or allowed normal weight-bearing reambulation (HLU + R). Mice given normal cage activity throughout the experiment served as healthy age-matched controls. All mice were sacrificed 4-days (DPF4) or 14-days (DPF14) following fracture to assess healing and uninjured hindlimb musculoskeletal properties (6-10 mice per treatment/biological sex). We found that continued disuse following fracture lead to severely diminished uninjured hindlimb skeletal muscle mass (gastrocnemius and soleus) and femoral bone volume adjacent to the fracture site compared to healthy age-matched controls across mouse sexes. Furthermore, HLU led to significantly decreased periosteal expansion (DPF4) and osteochondral tissue formation by DPF14, and trends in increased osteoclastogenesis (DPF14) and decreased woven bone vascular area (DPF14). In contrast, immediate reambulation for 2 weeks after fracture, even following a period of prolonged disuse, was able to increase hindlimb skeletal tissue mass and increase osteochondral tissue formation, albeit not to healthy control levels, in both mouse sexes. Furthermore, reambulation attenuated osteoclast formation seen in woven bone tissue undergoing disuse. Our results suggest that weight-bearing skeletal loading in both sexes immediately following fracture may improve callus healing and prevent further fall risk by stimulating skeletal muscle anabolism and decreasing callus resorption compared to minimal or delayed rehabilitation regimens.
Collapse
Affiliation(s)
- Evan G Buettmann
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Rachel C DeNapoli
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Lovell B Abraham
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Joe A Denisco
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Madelyn R Lorenz
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Michael A Friedman
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America
| | - Henry J Donahue
- Virginia Commonwealth University, Biomedical Engineering, Richmond, VA, United States of America.
| |
Collapse
|
7
|
Wang H, Chang X, Ma Q, Sun B, Li H, Zhou J, Hu Y, Yang X, Li J, Chen X, Song J. Bioinspired drug-delivery system emulating the natural bone healing cascade for diabetic periodontal bone regeneration. Bioact Mater 2023; 21:324-339. [PMID: 36185747 PMCID: PMC9483739 DOI: 10.1016/j.bioactmat.2022.08.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 08/23/2022] [Accepted: 08/29/2022] [Indexed: 12/01/2022] Open
Abstract
Diabetes mellitus (DM) aggravates periodontitis, resulting in accelerated periodontal bone resorption. Disordered glucose metabolism in DM causes reactive oxygen species (ROS) overproduction resulting in compromised bone healing, which makes diabetic periodontal bone regeneration a major challenge. Inspired by the natural bone healing cascade, a mesoporous silica nanoparticle (MSN)-incorporated PDLLA (poly(dl-lactide))-PEG-PDLLA (PPP) thermosensitive hydrogel with stepwise cargo release is designed to emulate the mesenchymal stem cell “recruitment-osteogenesis” cascade for diabetic periodontal bone regeneration. During therapy, SDF-1 quickly escapes from the hydrogel due to diffusion for early rat bone marrow stem cell (rBMSC) recruitment. Simultaneously, slow degradation of the hydrogel starts to gradually expose the MSNs for sustained release of metformin, which can scavenge the overproduced ROS under high glucose conditions to reverse the inhibited osteogenesis of rBMSCs by reactivating the AMPK/β-catenin pathway, resulting in regulation of the diabetic microenvironment and facilitation of osteogenesis. In vitro experiments indicate that the hydrogel markedly restores the inhibited migration and osteogenic capacities of rBMSCs under high glucose conditions. In vivo results suggest that it can effectively recruit rBMSCs to the periodontal defect and significantly promote periodontal bone regeneration under type 2 DM. In conclusion, our work provides a novel therapeutic strategy of a bioinspired drug-delivery system emulating the natural bone healing cascade for diabetic periodontal bone regeneration. A hydrogel was designed to emulate the cell “recruitment-osteogenesis” cascade. The fast release of SDF-1 effectively recruited BMSCs to the periodontal defect. The sustained metformin release markedly scavenged ROS and restored osteogenesis. The hydrogel significantly facilitated periodontal bone regeneration in T2DM.
Collapse
Affiliation(s)
- He Wang
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Xiaowei Chang
- Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering, School of Chemical Engineering and Technology, Xi′an Jiaotong University, Xi′an, 710049, China
| | - Qian Ma
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Boyang Sun
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Han Li
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Jinmin Zhou
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Yiyao Hu
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Xiaoyu Yang
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
| | - Jie Li
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
- Corresponding author.
| | - Xin Chen
- Department of Chemical Engineering, Shaanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering, School of Chemical Engineering and Technology, Xi′an Jiaotong University, Xi′an, 710049, China
- Corresponding author.
| | - Jinlin Song
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology of Chongqing Medical University, Chongqing, 401147, China
- Corresponding author.
| |
Collapse
|
8
|
Hu Z, Liu Y, Yao Z, Chen L, Wang G, Liu X, Tian Y, Cao G. Stages of preadipocyte differentiation: biomarkers and pathways for extracellular structural remodeling. Hereditas 2022; 159:47. [PMID: 36572937 PMCID: PMC9793557 DOI: 10.1186/s41065-022-00261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 12/05/2022] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND This study utilized bioinformatics to analyze the underlying biological mechanisms involved in adipogenic differentiation, synthesis of the extracellular matrix (ECM), and angiogenesis during preadipocyte differentiation in human Simpson-Golabi-Behmel syndrome at different time points and identify targets that can potentially improve fat graft survival. RESULTS We analyzed two expression profiles from the Gene Expression Omnibus and identified differentially expressed genes (DEGs) at six different time points after the initiation of preadipocyte differentiation. Related pathways were identified using Gene Ontology/Kyoto Encyclopedia of Genes and Genomes analyses and Gene Set Enrichment Analysis (GSEA). We further constructed a protein-protein interaction (PPI) network and its central genes. The results showed that upregulated DEGs were involved in cell differentiation, lipid metabolism, and other cellular activities, while downregulated DEGs were associated with angiogenesis and development, ECM tissue synthesis, and intercellular and intertissue adhesion. GSEA provided a more comprehensive basis, including participation in and positive regulation of key pathways of cell metabolic differentiation, such as the "peroxisome proliferator-activated receptor signaling pathway" and the "adenylate-activated protein kinase signaling pathway," a key pathway that negatively regulates pro-angiogenic development, ECM synthesis, and adhesion. CONCLUSIONS We identified the top 20 hub genes in the PPI network, including genes involved in cell differentiation, ECM synthesis, and angiogenesis development, providing potential targets to improve the long-term survival rate of fat grafts. Additionally, we identified drugs that may interact with these targets to potentially improve fat graft survival.
Collapse
Affiliation(s)
- Zhihan Hu
- grid.412194.b0000 0004 1761 9803Department of Clinical Medicine, Ningxia Medical University, Yinchuan, 750000 China
| | - Yi Liu
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Zongjiang Yao
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Liming Chen
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Gang Wang
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Xiaohui Liu
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Yafei Tian
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| | - Guangtong Cao
- grid.411294.b0000 0004 1798 9345Department of Burn Plastic Surgery and Wound Repair, Second Hospital of Lanzhou University, Lanzhou, 730030 China
| |
Collapse
|
9
|
The role of hypertrophic chondrocytes in regulation of the cartilage-to-bone transition in fracture healing. Bone Rep 2022; 17:101616. [PMID: 36105852 PMCID: PMC9465425 DOI: 10.1016/j.bonr.2022.101616] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/05/2022] [Accepted: 06/07/2022] [Indexed: 11/23/2022] Open
Abstract
Endochondral bone formation is an important pathway in fracture healing, involving the formation of a cartilaginous soft callus and the process of cartilage-to-bone transition. Failure or delay in the cartilage-to-bone transition causes an impaired bony union such as nonunion or delayed union. During the healing process, multiple types of cells including chondrocytes, osteoprogenitors, osteoblasts, and endothelial cells coexist in the callus, and inevitably crosstalk with each other. Hypertrophic chondrocytes located between soft cartilaginous callus and bony hard callus mediate the crosstalk regulating cell-matrix degradation, vascularization, osteoclast recruitment, and osteoblast differentiation in autocrine and paracrine manners. Furthermore, hypertrophic chondrocytes can become osteoprogenitors and osteoblasts, and directly contribute to woven bone formation. In this review, we focus on the roles of hypertrophic chondrocytes in fracture healing and dissect the intermingled crosstalk in fracture callus during the cartilage-to-bone transition.
Collapse
|
10
|
Functional Heterogeneity of Bone Marrow Mesenchymal Stem Cell Subpopulations in Physiology and Pathology. Int J Mol Sci 2022; 23:ijms231911928. [PMID: 36233230 PMCID: PMC9570000 DOI: 10.3390/ijms231911928] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 11/16/2022] Open
Abstract
Bone marrow mesenchymal stem cells (BMSCs) are multi-potent cell populations and are capable of maintaining bone and body homeostasis. The stemness and potential therapeutic effect of BMSCs have been explored extensively in recent years. However, diverse cell surface antigens and complex gene expression of BMSCs have indicated that BMSCs represent heterogeneous populations, and the natural characteristics of BMSCs make it difficult to identify the specific subpopulations in pathological processes which are often obscured by bulk analysis of the total BMSCs. Meanwhile, the therapeutic effect of total BMSCs is often less effective partly due to their heterogeneity. Therefore, understanding the functional heterogeneity of the BMSC subpopulations under different physiological and pathological conditions could have major ramifications for global health. Here, we summarize the recent progress of functional heterogeneity of BMSC subpopulations in physiology and pathology. Targeting tissue-resident single BMSC subpopulation offers a potentially innovative therapeutic strategy and improves BMSC effectiveness in clinical application.
Collapse
|
11
|
McKenzie JA, Galbreath IM, Coello AF, Hixon KR, Silva MJ. VEGFA from osteoblasts is not required for lamellar bone formation following tibial loading. Bone 2022; 163:116502. [PMID: 35872107 PMCID: PMC9624127 DOI: 10.1016/j.bone.2022.116502] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/05/2022] [Accepted: 07/18/2022] [Indexed: 11/27/2022]
Abstract
The relationship between osteogenesis and angiogenesis is complex. Normal bone development requires angiogenesis, mediated by vascular endothelial growth factor A (VEGFA). Studies have demonstrated through systemic inhibition or genetic modification that VEGFA is indispensable for several types of bone repair, presumably via its role in supporting angiogenesis. But a direct role for VEGFA within osteoblasts, in the absence of angiogenesis, has also been suggested. To address the question of whether VEGFA from osteoblasts supports bone formation directly, we applied anabolic loading to induce lamellar bone formation in mice, a process shown to be independent of angiogenesis. We hypothesized that VEGFA from osteoblasts is required for lamellar bone formation. To test this hypothesis, we applied axial tibial compression to inducible Cre/LoxP mice from three lines. Vegfafl/fl mice were crossed with Ubiquitin C (UBC), Osterix (Osx) and Dentin-Matrix Protein 1 (DMP1) Cre-ERT2 mice to target all cells, (pre)osteoblast-lineage cells, and mature osteoblasts and osteocytes, respectively. Genotype effects were determined by comparing control (Vegfafl/fl) and Cre+ (VegfaΔ) mice for each line. At 5 months of age tamoxifen was injected for 5 days followed by a 3-week clearance prior to loading. Female and male mice (N = 100) were loaded for 5 days to peak forces to engender -3100 με peak compressive strain and processed for dynamic histomorphometry (day 12). Percent MS/BS increased 20-70 % as a result of loading, with no effect of genotype in Osx or Dmp1 lines. In contrast, the UBC groups had a significant decrease in relative periosteal BFR/BS in VegfaΔ vs. Vegfafl/fl mice. The UBC line did not have any cortical bone phenotype in non-loaded femurs. In summary, dynamic histomorphometry data confirmed that tibial loading induces lamellar bone formation. Contrary to our hypothesis, there was no decrease in loading-induced bone formation in the Osx or Dmp1 lines in the absence of VEGFA. There was a decrease in bone formation in the UBC line where all cells were targeted. This result indicates that VEGFA from a non-osteoblast cell source supports loading-induced lamellar bone formation, although osteoblast/osteocyte VEGFA is dispensable. These findings support a paracrine model whereby non-osteoblast VEGFA supports lamellar bone formation, independent of angiogenesis.
Collapse
Affiliation(s)
- Jennifer A McKenzie
- Department of Orthopaedic Surgery and Musculoskeletal Research Center, Washington University in St. Louis, St. Louis, MO, United States of America
| | - Ian M Galbreath
- Department of Orthopaedic Surgery and Musculoskeletal Research Center, Washington University in St. Louis, St. Louis, MO, United States of America; St. Louis University, St. Louis, MO, United States of America
| | - Andre F Coello
- Department of Orthopaedic Surgery and Musculoskeletal Research Center, Washington University in St. Louis, St. Louis, MO, United States of America; Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States of America
| | - Katherine R Hixon
- Department of Orthopaedic Surgery and Musculoskeletal Research Center, Washington University in St. Louis, St. Louis, MO, United States of America; Dartmouth Engineering, Dartmouth College, Hanover, NH, United States of America
| | - Matthew J Silva
- Department of Orthopaedic Surgery and Musculoskeletal Research Center, Washington University in St. Louis, St. Louis, MO, United States of America; Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States of America.
| |
Collapse
|
12
|
Liu Y, Niu P, Zhou M, Xue H. The role of proteoglycan form of DMP1 in cranial repair. BMC Mol Cell Biol 2022; 23:43. [PMID: 36175851 PMCID: PMC9524138 DOI: 10.1186/s12860-022-00443-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 09/20/2022] [Indexed: 11/11/2022] Open
Abstract
Background The cranial region is a complex set of blood vessels, cartilage, nerves and soft tissues. The reconstruction of cranial defects caused by trauma, congenital defects and surgical procedures presents clinical challenges. Our previous data showed that deficiency of the proteoglycan (PG) form of dentin matrix protein 1 (DMP1-PG) could lead to abnormal cranial development. In addition, DMP1-PG was highly expressed in the cranial defect areas. The present study aimed to investigate the potential role of DMP1-PG in intramembranous ossification in cranial defect repair. Methods Mouse cranial defect models were established by using wild- type (WT) and DMP1-PG point mutation mice. Microcomputed tomography (micro-CT) and histological staining were performed to assess the extent of repair. Immunofluorescence assays and real-time quantitative polymerase chain reaction (RT‒qPCR) were applied to detect the differentially expressed osteogenic markers. RNA sequencing was performed to probe the molecular mechanism of DMP1-PG in regulating defect healing. Results A delayed healing process and an abnormal osteogenic capacity of primary osteoblasts were observed in DMP1-PG point mutation mice. Furthermore, impaired inflammatory signaling pathways were detected by using RNA transcription analysis of this model. Conclusions Our data indicate that DMP1-PG is an indispensable positive regulator during cranial defect healing. Supplementary Information The online version contains supplementary material available at 10.1186/s12860-022-00443-4.
Collapse
|
13
|
Zeng ZL, Xie H. Mesenchymal stem cell-derived extracellular vesicles: a possible therapeutic strategy for orthopaedic diseases: a narrative review. BIOMATERIALS TRANSLATIONAL 2022; 3:175-187. [PMID: 36654775 PMCID: PMC9840092 DOI: 10.12336/biomatertransl.2022.03.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/19/2022] [Accepted: 08/02/2022] [Indexed: 01/20/2023]
Abstract
Accumulating evidence suggests that the therapeutic role of mesenchymal stem cells (MSCs) in bone diseases is closely related to paracrine-generated extracellular vesicles (EVs). MSC-derived EVs (MSC-EVs) carry proteins, nucleic acids, and lipids to the extracellular space and affect the bone microenvironment. They have similar biological functions to MSCs, such as the ability to repair organ and tissue damage. In addition, MSC-EVs also have the advantages of long half-life, low immunogenicity, attractive stability, ability to pass through the blood-brain barrier, and demonstrate excellent performance with potential practical applications in bone diseases. In this review, we summarise the current applications and mechanisms of MSC-EVs in osteoporosis, osteoarthritis, bone tumours, osteonecrosis of the femoral head, and fractures, as well as the development of MSC-EVs combined with materials science in the field of orthopaedics. Additionally, we explore the critical challenges involved in the clinical application of MSC-EVs in orthopaedic diseases.
Collapse
Affiliation(s)
- Zhao-Lin Zeng
- Department of Metabolism and Endocrinology, The First Affliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan Province, China,Department of Clinical Medicine, The First Affliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan Province, China
| | - Hui Xie
- Department of Orthopaedics, Movement System Injury and Repair Research Centre, Xiangya Hospital, Central South University, Changsha, Hunan Province, China,Corresponding author: Hui Xie,
| |
Collapse
|
14
|
Ford CA, Hurford IM, Fulbright LE, Curry JM, Peek CT, Spoonmore TJ, Cruz Victorio V, Johnson JR, Peck SH, Cassat JE. Loss of Vhl alters trabecular bone loss during S. aureus osteomyelitis in a cell-specific manner. Front Cell Infect Microbiol 2022; 12:985467. [PMID: 36204648 PMCID: PMC9530664 DOI: 10.3389/fcimb.2022.985467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 08/29/2022] [Indexed: 01/07/2023] Open
Abstract
Osteomyelitis, or bone infection, is a major complication of accidental trauma or surgical procedures involving the musculoskeletal system. Staphylococcus aureus is the most frequently isolated pathogen in osteomyelitis and triggers significant bone loss. Hypoxia-inducible factor (HIF) signaling has been implicated in antibacterial immune responses as well as bone development and repair. In this study, the impact of bone cell HIF signaling on antibacterial responses and pathologic changes in bone architecture was explored using genetic models with knockout of either Hif1a or a negative regulator of HIF-1α, Vhl. Deletion of Hif1a in osteoblast-lineage cells via Osx-Cre (Hif1aΔOB ) had no impact on bacterial clearance or pathologic changes in bone architecture in a model of post-traumatic osteomyelitis. Knockout of Vhl in osteoblast-lineage cells via Osx-Cre (VhlΔOB ) caused expected increases in trabecular bone volume per total volume (BV/TV) at baseline and, intriguingly, did not exhibit an infection-mediated decline in trabecular BV/TV, unlike control mice. Despite this phenotype, bacterial burdens were not affected by loss of Vhl. In vitro studies demonstrated that transcriptional regulation of the osteoclastogenic cytokine receptor activator of NF-κB ligand (RANKL) and its inhibitor osteoprotegerin (OPG) is altered in osteoblast-lineage cells with knockout of Vhl. After observing no impact on bacterial clearance with osteoblast-lineage conditional knockouts, a LysM-Cre model was used to generate Hif1aΔMyeloid and VhlΔMyeloid mouse models to explore the impact of myeloid cell HIF signaling. In both Hif1aΔMyeloid and VhlΔMyeloid models, bacterial clearance was not impacted. Moreover, minimal impacts on bone architecture were observed. Thus, skeletal HIF signaling was not found to impact bacterial clearance in our mouse model of post-traumatic osteomyelitis, but Vhl deletion in the osteoblast lineage was found to limit infection-mediated trabecular bone loss, possibly via altered regulation of RANKL-OPG gene transcription.
Collapse
Affiliation(s)
- Caleb A. Ford
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States
| | - Ian M. Hurford
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Laura E. Fulbright
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Jacob M. Curry
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Christopher T. Peek
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Thomas J. Spoonmore
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, United States
| | - Virginia Cruz Victorio
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Joshua R. Johnson
- Vanderbilt Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, United States
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Sun H. Peck
- Vanderbilt Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, United States
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - James E. Cassat
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
- Vanderbilt Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN, United States
- Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Vanderbilt University Medical Center, Nashville, TN, United States
| |
Collapse
|
15
|
Sherman KM, Williams DK, Welsh CA, Cooper AM, Falck A, Huggins S, Bokhari RS, Gaddy D, McKelvey KD, Dawson LA, Suva LJ. Low bone mass and impaired fracture healing in mouse models of Trisomy21 (Down syndrome). Bone 2022; 162:116471. [PMID: 35716916 PMCID: PMC9356441 DOI: 10.1016/j.bone.2022.116471] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/01/2022] [Accepted: 06/09/2022] [Indexed: 11/16/2022]
Abstract
Individuals with Down syndrome (DS), the result of trisomy of human chromosome Hsa21 (Ts21), present with an array of skeletal abnormalities typified by altered craniofacial features, short stature and low bone mineral density (BMD). While bone deficits progress with age in both sexes, low bone mass is more pronounced in DS men than women and osteopenia appears earlier. In the current study, the reproductive hormone status (FSH, LH, testosterone) of 17 DS patients (males, ages range 19-52 years) was measured. Although testosterone was consistently low, the hypothalamic-pituitary-gonadal axis was intact with corresponding rises in FSH and LH. To provide further insight into the heterogeneity of the bone mass in DS, the skeletal phenotypes of three of the most used murine DS models, Ts65Dn (Ts65), TC1, and Dp16(Yey1) (Dp16) were characterized and contrasted. Evaluation of the bone phenotype of both male and female 3-month-old Dp16 mice demonstrated sexual dimorphism, with low bone mass apparent in males, as it is in Ts65, but not in female Dp16. In contrast, male TC1 mice had no apparent bone phenotype. To determine whether low bone mass in DS impacted fracture healing, fractures of the middle phalanx (P2) digits were generated in both male and female Dp16 mice at 15 weeks of age, an age where the sexually dimorphic low BMD persisted. Fracture healing was assessed via in vivo microCT over (13 weeks) 93 days post fracture (DPF). At 93 DPF, 0 % of DS male (n = 12) or female (n = 8) fractures healed, compared to 50 % of the male (n = 28) or female (n = 8) WT littermate fractures. MicroCT revealed periosteal unbridged mineralized callus formation across the fracture gap in Dp16 mice, which was confirmed by subsequent histology. These studies provide the first direct evidence of significantly impaired fracture healing in the setting of DS.
Collapse
Affiliation(s)
- Kirby M Sherman
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Diarra K Williams
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Casey A Welsh
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Alexis M Cooper
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Alyssa Falck
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Shannon Huggins
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Rihana S Bokhari
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Dana Gaddy
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Kent D McKelvey
- Department of Family Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States of America; Department of Medical Genetics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, United States of America
| | - Lindsay A Dawson
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America
| | - Larry J Suva
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, United States of America.
| |
Collapse
|
16
|
Ma TL, Chen JX, Ke ZR, Zhu P, Hu YH, Xie J. Targeting regulation of stem cell exosomes: Exploring novel strategies for aseptic loosening of joint prosthesis. Front Bioeng Biotechnol 2022; 10:925841. [PMID: 36032702 PMCID: PMC9399432 DOI: 10.3389/fbioe.2022.925841] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 07/11/2022] [Indexed: 12/03/2022] Open
Abstract
Periprosthetic osteolysis is a major long-term complication of total joint replacement. A series of biological reactions caused by the interaction of wear particles at the prosthesis bone interface and surrounding bone tissue cells after artificial joint replacement are vital reasons for aseptic loosening. Disorder of bone metabolism and aseptic inflammation induced by wear particles are involved in the occurrence and development of aseptic loosening of the prosthesis. Promoting osteogenesis and angiogenesis and mediating osteoclasts and inflammation may be beneficial in preventing the aseptic loosening of the prosthesis. Current research about the prevention and treatment of aseptic loosening of the prosthesis focuses on drug, gene, and stem cell therapy and has not yet achieved satisfactory clinical efficacy or has not been used in clinical practice. Exosomes are a kind of typical extracellular vehicle. In recent years, stem cell exosomes (Exos) have been widely used to regulate bone metabolism, block inflammation, and have broad application prospects in tissue repair and cell therapy.
Collapse
Affiliation(s)
- Tian-Liang Ma
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Impants, Xiangya Hospital, Central South University, Changsha, China
- XiangYa School of Medicine, Central South University, Changsha, China
| | - Jing-Xian Chen
- XiangYa School of Medicine, Central South University, Changsha, China
| | - Zhuo-Ran Ke
- XiangYa School of Medicine, Central South University, Changsha, China
| | - Peng Zhu
- XiangYa School of Medicine, Central South University, Changsha, China
| | - Yi-He Hu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Impants, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Yi-He Hu, ; Jie Xie,
| | - Jie Xie
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, China
- Hunan Engineering Research Center of Biomedical Metal and Ceramic Impants, Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Yi-He Hu, ; Jie Xie,
| |
Collapse
|
17
|
Ansari M, Rezaei-Tavirani M, Hamzeloo-Moghadam M, Vafaee R, Razzaghi M, Nikzamir M, Rostami Nejad M, Zamanizn Azodi M. Assessment of Immunological Effects of Low-Level Er: YAG Laser Radiation. J Lasers Med Sci 2022; 13:e25. [PMID: 36743141 PMCID: PMC9841375 DOI: 10.34172/jlms.2022.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/05/2022] [Indexed: 11/22/2022]
Abstract
Introduction: Low-level laser radiation has a significant effect on cell proliferation. Various investigations into the effect of Er: YAG laser on the treated cell lines have been published. Determining core targeted proteins is an attractive subject. This research aimed at identifying the critical targeted protein by a low-level Er: YAG laser in primary osteoblast-like cells. Methods: Data were extracted from the literature about proteomic assessment of 3.3 J/cm2 of low-level Er: YAG laser radiation on osteoblast-like cells of rat calvaria. The significant differentially expressed proteins plus 100 first neighbors were analyzed via network analysis and gene ontology enrichment. Results: Nine differentially expressed proteins among the 12 queried proteins were included in the main connected component. Analysis revealed that Cxcl1 was a key targeted protein in response to laser radiation. The presence of Cxcl1 in the significant cellular pathways indicated that cell growth and proliferation were affected. Conclusion: It can be concluded that the immune system is affected by the laser to activate cellular defense against stress.
Collapse
Affiliation(s)
- Mojtaba Ansari
- Faculty of Medicine, Imam Hosein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mostafa Rezaei-Tavirani
- Proteomics Research Center, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Hamzeloo-Moghadam
- Traditional Medicine and Materia Medica Research Center and Department of Traditional Pharmacy, School of Traditional Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Vafaee
- Critical Care Quality Improvement Research Center, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohhamadreza Razzaghi
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahfam Nikzamir
- Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Rostami Nejad
- Research Institute for Gastroenterology and Liver Diseases, Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mona Zamanizn Azodi
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran,Correspondence to Mona Zamanizn Azodi,
| |
Collapse
|
18
|
Hixon KR, Miller AN. Animal models of impaired long bone healing and tissue engineering- and cell-based in vivo interventions. J Orthop Res 2022; 40:767-778. [PMID: 35072292 DOI: 10.1002/jor.25277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 12/05/2021] [Accepted: 01/16/2022] [Indexed: 02/04/2023]
Abstract
Bone healing after injury typically follows a systematic process and occurs spontaneously under appropriate physiological conditions. However, impaired long bone healing is still quite common and may require surgical intervention. Various complications can result in different forms of impaired bone healing including nonunion, critical-size defects, or stress fractures. While a nonunion may occur due to impaired biological signaling and/or mechanical instability, a critical-size defect exhibits extensive bone loss that will not spontaneously heal. Comparatively, a stress fracture occurs from repetitive forces and results in a non-healing crack or break in the bone. Clinical standards of treatment vary between these bone defects due to their pathological differences. The use of appropriate animal models for modeling healing defects is critical to improve current treatment methods and develop novel rescue therapies. This review provides an overview of these clinical bone healing impairments and current animal models available to study the defects in vivo. The techniques used to create these models are compared, along with the outcomes, to clarify limitations and future objectives. Finally, rescue techniques focused on tissue engineering and cell-based therapies currently applied in animal models are specifically discussed to analyze their ability to initiate healing at the defect site, providing information regarding potential future therapies. In summary, this review focuses on the current animal models of nonunion, critical-size defects, and stress fractures, as well as interventions that have been tested in vivo to provide an overview of the clinical potential and future directions for improving bone healing.
Collapse
Affiliation(s)
- Katherine R Hixon
- Department of Orthopaedic Surgery, Washington University, St. Louis, Missouri, USA.,Thayer School of Engineering, Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, USA
| | - Anna N Miller
- Department of Orthopaedic Surgery, Washington University, St. Louis, Missouri, USA
| |
Collapse
|
19
|
Sun K, Wang C, Xiao J, Brodt MD, Yuan L, Yang T, Alippe Y, Hu H, Hao D, Abu-Amer Y, Silva MJ, Shen J, Mbalaviele G. Fracture healing is delayed in the absence of gasdermin - interleukin-1 signaling. eLife 2022; 11:75753. [PMID: 35244027 PMCID: PMC8923664 DOI: 10.7554/elife.75753] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/27/2022] [Indexed: 11/13/2022] Open
Abstract
Amino-terminal fragments from proteolytically cleaved gasdermins (GSDMs) form plasma membrane pores that enable the secretion of interleukin-1β (IL-1β) and IL-18. Excessive GSDM-mediated pore formation can compromise the integrity of the plasma membrane thereby causing the lytic inflammatory cell death, pyroptosis. We found that GSDMD and GSDME were the only GSDMs that were readily expressed in bone microenvironment. Therefore, we tested the hypothesis that GSDMD and GSDME are implicated in fracture healing owing to their role in the obligatory inflammatory response following injury. We found that bone callus volume and biomechanical properties of injured bones were significantly reduced in mice lacking either GSDM compared with wild-type (WT) mice, indicating that fracture healing was compromised in mutant mice. However, compound loss of GSDMD and GSDME did not exacerbate the outcomes, suggesting shared actions of both GSDMs in fracture healing. Mechanistically, bone injury induced IL-1β and IL-18 secretion in vivo, a response that was mimicked in vitro by bone debris and ATP, which function as inflammatory danger signals. Importantly, the secretion of these cytokines was attenuated in conditions of GSDMD deficiency. Finally, deletion of IL-1 receptor reproduced the phenotype of Gsdmd or Gsdme deficient mice, implying that inflammatory responses induced by the GSDM-IL-1 axis promote bone healing after fracture.
Collapse
Affiliation(s)
- Kai Sun
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Chun Wang
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Jianqiu Xiao
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Michael D Brodt
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, United States
| | - Luorongxin Yuan
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Tong Yang
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Yael Alippe
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| | - Huimin Hu
- Department of Spine Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Dingjun Hao
- Department of Spine Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yousef Abu-Amer
- Department of Orthopaedic Surgery, Washington University School of Medicine, Saint Louis, United States
| | - Matthew J Silva
- Department of Orthopaedic Surgery, Washington University School of Medicine, Saint Louis, United States
| | - Jie Shen
- Department of Orthopaedic Surgery, Washington University School of Medicine, Saint Louis, United States
| | - Gabriel Mbalaviele
- Division of Bone and Mineral Diseases, Washington University School of Medicine, St. Louis, United States
| |
Collapse
|
20
|
Sheppard AJ, Barfield AM, Barton S, Dong Y. Understanding Reactive Oxygen Species in Bone Regeneration: A Glance at Potential Therapeutics and Bioengineering Applications. Front Bioeng Biotechnol 2022; 10:836764. [PMID: 35198545 PMCID: PMC8859442 DOI: 10.3389/fbioe.2022.836764] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/19/2022] [Indexed: 01/24/2023] Open
Abstract
Although the complex mechanism by which skeletal tissue heals has been well described, the role of reactive oxygen species (ROS) in skeletal tissue regeneration is less understood. It has been widely recognized that a high level of ROS is cytotoxic and inhibits normal cellular processes. However, with more recent discoveries, it is evident that ROS also play an important, positive role in skeletal tissue repair, specifically fracture healing. Thus, dampening ROS levels can potentially inhibit normal healing. On the same note, pathologically high levels of ROS cause a sharp decline in osteogenesis and promote nonunion in fracture repair. This delicate balance complicates the efforts of therapeutic and engineering approaches that aim to modulate ROS for improved tissue healing. The physiologic role of ROS is dependent on a multitude of factors, and it is important for future efforts to consider these complexities. This review first discusses how ROS influences vital signaling pathways involved in the fracture healing response, including how they affect angiogenesis and osteogenic differentiation. The latter half glances at the current approaches to control ROS for improved skeletal tissue healing, including medicinal approaches, cellular engineering, and enhanced tissue scaffolds. This review aims to provide a nuanced view of the effects of ROS on bone fracture healing which will inspire novel techniques to optimize the redox environment for skeletal tissue regeneration.
Collapse
Affiliation(s)
- Aaron J. Sheppard
- Department of Orthopaedic Surgery, Louisiana State University Health Shreveport, Shreveport, LA, United States
- School of Medicine, Louisiana State University Health Shreveport, Shreveport, LA, United States
| | - Ann Marie Barfield
- Department of Orthopaedic Surgery, Louisiana State University Health Shreveport, Shreveport, LA, United States
- School of Medicine, Louisiana State University Health Shreveport, Shreveport, LA, United States
| | - Shane Barton
- Department of Orthopaedic Surgery, Louisiana State University Health Shreveport, Shreveport, LA, United States
| | - Yufeng Dong
- Department of Orthopaedic Surgery, Louisiana State University Health Shreveport, Shreveport, LA, United States
| |
Collapse
|
21
|
Zhang B, Yuan L, Chen G, Chen X, Yang X, Fan T, Sun C, Fan D, Chen Z. Deciphering Obesity-Related Gene Clusters Unearths SOCS3 Immune Infiltrates and 5mC/m6A Modifiers in Ossification of Ligamentum Flavum Pathogenesis. Front Endocrinol (Lausanne) 2022; 13:861567. [PMID: 35712246 PMCID: PMC9196192 DOI: 10.3389/fendo.2022.861567] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Ossification of ligamentum flavum (OLF) is an insidious and debilitating heterotopic ossifying disease with etiological heterogeneity and undefined pathogenesis. Obese individuals predispose to OLF, whereas the underlying connections between obesity phenotype and OLF pathomechanism are not fully understood. Therefore, this study aims to explore distinct obesity-related genes and their functional signatures in OLF. METHODS The transcriptome sequencing data related to OLF were downloaded from the GSE106253 in the Gene Expression Omnibus (GEO) database. The obesity-related differentially expressed genes (ORDEGs) in OLF were screened, and functional and pathway enrichment analysis were applied for these genes. Furthermore, protein-protein interactions (PPI), module analysis, transcription factor enrichment analysis (TFEA), and experiment validation were used to identify hub ORDEGs. The immune infiltration landscape in OLF was depicted, and correlation analysis between core gene SOCS3 and OLF-related infiltrating immune cells (OIICs) as well as 5mC/m6A modifiers in OLF was constructed. RESULTS Ninety-nine ORDEGs were preliminarily identified, and functional annotations showed these genes were mainly involved in metabolism, inflammation, and immune-related biological functions and pathways. Integrative bioinformatic algorithms determined a crucial gene cluster associated with inflammatory/immune responses, such as TNF signaling pathway, JAK-STAT signaling pathway, and regulation of interferon-gamma-mediated signaling. Eight hub ORDEGs were validated, including 6 down-regulated genes (SOCS3, PPARG, ICAM-1, CCL2, MYC, and NT5E) and 2 up-regulated genes (PTGS2 and VEGFA). Furthermore, 14 differential OIICs were identified by ssGSEA and xCell, and SOCS3 was overlapped to be the core gene, which was associated with multiple immune infiltrates (dendritic cells, macrophage, and T cells) and six m6A modifiers as well as four 5mC regulators in OLF. Reduced SOCS3 and FTO expression and up-regulated DNMT1 level in OLF were validated by Western blotting. CONCLUSION This study deciphered immune/inflammatory signatures of obesity-related gene clusters for the first time, and defined SOCS3 as one core gene. The crosstalk between 5mC/m6A methylation may be a key mediator of SOCS3 expression and immune infiltration. These findings will provide more insights into molecular mechanisms and therapeutic targets of obesity-related OLF.
Collapse
Affiliation(s)
- Baoliang Zhang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Lei Yuan
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Guanghui Chen
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Xi Chen
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Xiaoxi Yang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Tianqi Fan
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Chuiguo Sun
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Dongwei Fan
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
| | - Zhongqiang Chen
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, China
- *Correspondence: Zhongqiang Chen,
| |
Collapse
|
22
|
Abstract
Fracture healing is a complex, multistep process that is highly sensitive to mechanical signaling. To optimize repair, surgeons prescribe immediate weight-bearing as-tolerated within 24 hours after surgical fixation; however, this recommendation is based on anecdotal evidence and assessment of bulk healing outcomes (e.g., callus size, bone volume, etc.). Given challenges in accurately characterizing the mechanical environment and the ever-changing properties of the regenerate, the principles governing mechanical regulation of repair, including their cell and molecular basis, are not yet well defined. However, the use of mechanobiological rodent models, and their relatively large genetic toolbox, combined with recent advances in imaging approaches and single-cell analyses is improving our understanding of the bone microenvironment in response to loading. This review describes the identification and characterization of distinct cell populations involved in bone healing and highlights the most recent findings on mechanical regulation of bone homeostasis and repair with an emphasis on osteo-angio coupling. A discussion on aging and its impact on bone mechanoresponsiveness emphasizes the need for novel mechanotherapeutics that can re-sensitize skeletal stem and progenitor cells to physical rehabilitation protocols.
Collapse
Affiliation(s)
- Tareq Anani
- Department of Orthopedic Surgery, New York University Langone Health, New York, NY 10010, USA
| | - Alesha B Castillo
- Department of Orthopedic Surgery, New York University Langone Health, New York, NY 10010, USA; Department of Biomedical Engineering, Tandon School of Engineering, New York University, New York, NY 11201, USA; Department of Veterans Affairs, New York Harbor Healthcare System, Manhattan Campus, New York, NY 10010, USA.
| |
Collapse
|
23
|
Buettmann EG, Yoneda S, Hu P, McKenzie JA, Silva MJ. Postnatal Osterix but not DMP1 lineage cells significantly contribute to intramembranous ossification in three preclinical models of bone injury. Front Physiol 2022; 13:1083301. [PMID: 36685200 PMCID: PMC9846510 DOI: 10.3389/fphys.2022.1083301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 12/02/2022] [Indexed: 01/06/2023] Open
Abstract
Murine models of long-bone fracture, stress fracture, and cortical defect are used to discern the cellular and molecular mediators of intramembranous and endochondral bone healing. Previous work has shown that Osterix (Osx+) and Dentin Matrix Protein-1 (DMP1+) lineage cells and their progeny contribute to injury-induced woven bone formation during femoral fracture, ulnar stress fracture, and tibial cortical defect repair. However, the contribution of pre-existing versus newly-derived Osx+ and DMP1+ lineage cells in these murine models of bone injury is unclear. We addressed this knowledge gap by using male and female 12-week-old, tamoxifen-inducible Osx Cre_ERT2 and DMP1 Cre_ERT2 mice harboring the Ai9 TdTomato reporter allele. To trace pre-existing Osx+ and DMP1+ lineage cells, tamoxifen (TMX: 100 mg/kg gavage) was given in a pulse manner (three doses, 4 weeks before injury), while to label pre-existing and newly-derived lineage Osx+ and DMP1+ cells, TMX was first given 2 weeks before injury and continuously (twice weekly) throughout healing. TdTomato positive (TdT+) cell area and cell fraction were quantified from frozen histological sections of injured and uninjured contralateral samples at times corresponding with active woven bone formation in each model. We found that in uninjured cortical bone tissue, Osx Cre_ERT2 was more efficient than DMP1 Cre_ERT2 at labeling the periosteal and endosteal surfaces, as well as intracortical osteocytes. Pulse-labeling revealed that pre-existing Osx+ lineage and their progeny, but not pre-existing DMP1+ lineage cells and their progeny, significantly contributed to woven bone formation in all three injury models. In particular, these pre-existing Osx+ lineage cells mainly lined new woven bone surfaces and became embedded as osteocytes. In contrast, with continuous dosing, both Osx+ and DMP1+ lineage cells and their progeny contributed to intramembranous woven bone formation, with higher TdT+ tissue area and cell fraction in Osx+ lineage versus DMP1+ lineage calluses (femoral fracture and ulnar stress fracture). Similarly, Osx+ and DMP1+ lineage cells and their progeny significantly contributed to endochondral callus regions with continuous dosing only, with higher TdT+ chondrocyte fraction in Osx+ versus DMP1+ cell lineages. In summary, pre-existing Osx+ but not DMP1+ lineage cells and their progeny make up a significant amount of woven bone cells (particularly osteocytes) across three preclinical models of bone injury. Therefore, Osx+ cell lineage modulation may prove to be an effective therapy to enhance bone regeneration.
Collapse
Affiliation(s)
- Evan G Buettmann
- Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, United States.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States.,Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States
| | - Susumu Yoneda
- Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Pei Hu
- Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Jennifer A McKenzie
- Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Matthew J Silva
- Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, United States.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, United States
| |
Collapse
|
24
|
Gomez GA, Rundle CH, Xing W, Kesavan C, Pourteymoor S, Lewis RE, Powell DR, Mohan S. Contrasting effects of <i>Ksr2</i>, an obesity gene, on trabecular bone volume and bone marrow adiposity. eLife 2022; 11:82810. [PMID: 36342465 PMCID: PMC9640193 DOI: 10.7554/elife.82810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/06/2022] [Indexed: 11/25/2022] Open
Abstract
Pathological obesity and its complications are associated with an increased propensity for bone fractures. Humans with certain genetic polymorphisms at the kinase suppressor of ras2 (KSR2) locus develop severe early-onset obesity and type 2 diabetes. Both conditions are phenocopied in mice with <i>Ksr2</i> deleted, but whether this affects bone health remains unknown. Here we studied the bones of global <i>Ksr2</i> null mice and found that <i>Ksr2</i> negatively regulates femoral, but not vertebral, bone mass in two genetic backgrounds, while the paralogous gene, <i>Ksr1</i>, was dispensable for bone homeostasis. Mechanistically, KSR2 regulates bone formation by influencing adipocyte differentiation at the expense of osteoblasts in the bone marrow. Compared with <i>Ksr2</i>'s known role as a regulator of feeding by its function in the hypothalamus, pair-feeding and osteoblast-specific conditional deletion of <i>Ksr2</i> reveals that <i>Ksr2</i> can regulate bone formation autonomously. Despite the gains in appendicular bone mass observed in the absence of <i>Ksr2</i>, bone strength, as well as fracture healing response, remains compromised in these mice. This study highlights the interrelationship between adiposity and bone health and provides mechanistic insights into how <i>Ksr2</i>, an adiposity and diabetic gene, regulates bone metabolism.
Collapse
Affiliation(s)
| | - Charles H Rundle
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | - Weirong Xing
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | - Chandrasekhar Kesavan
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | | | | | | | - Subburaman Mohan
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| |
Collapse
|
25
|
Wang Z, Liu Y, Zhang J, Lin M, Xiao C, Bai H, Liu C. Mechanical loading alleviated the inhibition of β2-adrenergic receptor agonist terbutaline on bone regeneration. FASEB J 2021; 35:e22033. [PMID: 34739146 DOI: 10.1096/fj.202101045rr] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 10/19/2021] [Accepted: 10/22/2021] [Indexed: 12/14/2022]
Abstract
The long-term use of adrenergic medication in treating various conditions, such as asthma, increases the chances of bone fracture. Dynamic mechanical loading at a specific time is a method for improving bone quality and promoting healing. Therefore, we hypothesized that precisely controlling the mechanical environment can contribute to the alleviation of the negative effects of chronic treatment with the common asthma drug terbutaline, which is a β2-adrenergic receptor agonist that facilitates bone homeostasis and defect repair through its anabolic effect on osteogenic cells. Our in vitro results showed that terbutaline can directly inhibit osteogenesis by impairing osteogenic differentiation and mineralization. Chronic treatment in vivo was simulated by administering terbutaline to C57BL/6J mice for 4 weeks before bone defect surgery and mechanical loading. We utilized a stabilized tibial defect model, which allowed the application of anabolic mechanical loading. During homeostasis, chronic terbutaline treatment reduced the bone formation rate, the fracture toughness of long bones, and the concentrations of bone formation markers in the sera. During defect repair, terbutaline decreased the bone volume, type H vessel, and total blood vessel volume. Terbutaline treatment reduced the number of osteogenic cells. Periostin, which was secreted mainly by Prrx1+ osteoprogenitors and F4/80+ macrophages, was inhibited by treating the bone defect with terbutaline. Interestingly, controlled mechanical loading facilitated the recovery of bone volume and periostin expression and the number of osteogenic cells within the defect. In conclusion, mechanical loading can rescue negative effects on new bone accrual and repair induced by chronic terbutaline treatment.
Collapse
Affiliation(s)
- Ziyan Wang
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Yang Liu
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Jianing Zhang
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Minmin Lin
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Chufan Xiao
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Haoying Bai
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Chao Liu
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
| |
Collapse
|
26
|
Janebodin K, Chavanachat R, Hays A, Reyes Gil M. Silencing VEGFR-2 Hampers Odontoblastic Differentiation of Dental Pulp Stem Cells. Front Cell Dev Biol 2021; 9:665886. [PMID: 34249919 PMCID: PMC8267829 DOI: 10.3389/fcell.2021.665886] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/28/2021] [Indexed: 01/09/2023] Open
Abstract
Dental pulp stem cells (DPSCs) are a source of postnatal stem cells essential for maintenance and regeneration of dentin and pulp tissues. Previous in vivo transplantation studies have shown that DPSCs are able to give rise to odontoblast-like cells, form dentin/pulp-like structures, and induce blood vessel formation. Importantly, dentin formation is closely associated to blood vessels. We have previously demonstrated that DPSC-induced angiogenesis is VEGFR-2-dependent. VEGFR-2 may play an important role in odontoblast differentiation of DPSCs, tooth formation and regeneration. Nevertheless, the role of VEGFR-2 signaling in odontoblast differentiation of DPSCs is still not well understood. Thus, in this study we aimed to determine the role of VEGFR-2 in odontoblast differentiation of DPSCs by knocking down the expression of VEGFR-2 in DPSCs and studying their odontoblast differentiation capacity in vitro and in vivo. Isolation and characterization of murine DPSCs was performed as previously described. DPSCs were induced by VEGFR-2 shRNA viral vectors transfection (MOI = 10:1) to silence the expression of VEGFR-2. The GFP+ expression in CopGFP DPSCs was used as a surrogate to measure the efficiency of transfection and verification that the viral vector does not affect the expression of VEGFR-2. The efficiency of viral transfection was shown by significant reduction in the levels of VEGFR-2 based on the Q-RT-PCR and immunofluorescence in VEGFR-2 knockdown DPSCs, compared to normal DPSCs. VEGFR-2 shRNA DPSCs expressed not only very low level of VEGFR-2, but also that of its ligand, VEGF-A, compared to CopGFP DPSCs in both transcriptional and translational levels. In vitro differentiation of DPSCs in osteo-odontogenic media supplemented with BMP-2 (100 ng/ml) for 21 days demonstrated that CopGFP DPSCs, but not VEGFR-2 shRNA DPSCs, were positive for alkaline phosphatase (ALP) staining and formed mineralized nodules demonstrated by positive Alizarin Red S staining. The expression levels of dentin matrix proteins, dentin matrix protein-1 (Dmp1), dentin sialoprotein (Dspp), and bone sialoprotein (Bsp), were also up-regulated in differentiated CopGFP DPSCs, compared to those in VEGFR-2 shRNA DPSCs, suggesting an impairment of odontoblast differentiation in VEGFR-2 shRNA DPSCs. In vivo subcutaneous transplantation of DPSCs with hydroxyapatite (HAp/TCP) for 5 weeks demonstrated that CopGFP DPSCs were able to differentiate into elongated and polarized odontoblast-like cells forming loose connective tissue resembling pulp-like structures with abundant blood vessels, as demonstrated by H&E, Alizarin Red S, and dentin matrix staining. On the other hand, in VEGFR-2 shRNA DPSC transplants, odontoblast-like cells were not observed. Collagen fibers were seen in replacement of dentin/pulp-like structures. These results indicate that VEGFR-2 may play an important role in dentin regeneration and highlight the potential of VEGFR-2 modulation to enhance dentin regeneration and tissue engineering as a promising clinical application.
Collapse
Affiliation(s)
- Kajohnkiart Janebodin
- Department of Pathology, University of Washington, Seattle, WA, United States.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States.,Department of Anatomy, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | - Aislinn Hays
- Department of Pathology, University of Washington, Seattle, WA, United States.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States.,Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY, United States
| | - Morayma Reyes Gil
- Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY, United States
| |
Collapse
|
27
|
Ikedo A, Imai Y. Estrogen receptor α in mature osteoblasts regulates the late stage of bone regeneration. Biochem Biophys Res Commun 2021; 559:238-244. [PMID: 33964733 DOI: 10.1016/j.bbrc.2021.04.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 04/27/2021] [Indexed: 11/16/2022]
Abstract
Estrogen deficiency impairs fracture healing and homeostasis of bone tissue. OVX-induced estrogen deficiency in mice attenuates fracture healing and changes the expression ratio of estrogen receptor (ER) α and ERβ in callus during the process of fracture healing. Therefore, ERs may be involved in the regulation of fracture healing. However, the roles of ERs in fracture healing are largely unknown. The purpose of this study was to clarify the significance of ERs during fracture healing using osteoblast-specific ER knockout mice in a mono-cortical drill hole bone regeneration model. The mature osteoblast-specific ER knockout mice were generated using osteocalcin (OCN)-Cre mice, and ERα and ERβ flox mice (OCN-Cre; ERαf/f, ERαΔOb/ΔOb and OCN-Cre; ERβf/f, ERβΔOb/ΔOb). Drill hole surgery was conducted on the tibiae of 8-week-old female mice. The mice were sacrificed 10 or 14 days after surgery and the bones were analyzed by DXA, μCT and bone histomorphometry. DXA analysis revealed that intact femoral BMD was significantly decreased in ERαΔOb/ΔOb mice compared with ERαf/f mice, but there was no difference in bone mass between ERβΔOb/ΔOb and ERβf/f mice. Micro CT analyses showed that the callus volume at the restricted drill hole site in tibiae was significantly less in ERαΔOb/ΔOb compared to ERαf/f mice only at day 14 but not at day 10. In addition to femoral BMD, there was no significant difference in callus volume between ERβΔOb/ΔOb and ERβf/f mice. Bone histomorphometric analyses showed that Ob.S/BS and N.Ob/B.Pm were significantly less in ERαΔOb/ΔOb mice compared with ERαf/f mice only at day 10. In addition, Oc.S/BS and N.Oc/B.Pm were significantly less in ERαΔOb/ΔOb mice compared with ERαf/f mice only at day 14. These results suggest that ERα but not ERβ in osteocalcin-positive osteoblasts may contribute to the late stage of bone regeneration.
Collapse
Affiliation(s)
- Aoi Ikedo
- Division of Integrative Pathophysiology, Proteo-Science Center, Ehime University, Ehime, Japan
| | - Yuuki Imai
- Division of Integrative Pathophysiology, Proteo-Science Center, Ehime University, Ehime, Japan; Department of Pathophysiology, Ehime University Graduate School of Medicine, Ehime, Japan.
| |
Collapse
|
28
|
Wang C, Ying J, Nie X, Zhou T, Xiao D, Swarnkar G, Abu-Amer Y, Guan J, Shen J. Targeting angiogenesis for fracture nonunion treatment in inflammatory disease. Bone Res 2021; 9:29. [PMID: 34099632 PMCID: PMC8184936 DOI: 10.1038/s41413-021-00150-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/20/2021] [Accepted: 02/01/2021] [Indexed: 02/05/2023] Open
Abstract
Atrophic fracture nonunion poses a significant clinical problem with limited therapeutic interventions. In this study, we developed a unique nonunion model with high clinical relevance using serum transfer-induced rheumatoid arthritis (RA). Arthritic mice displayed fracture nonunion with the absence of fracture callus, diminished angiogenesis and fibrotic scar tissue formation leading to the failure of biomechanical properties, representing the major manifestations of atrophic nonunion in the clinic. Mechanistically, we demonstrated that the angiogenesis defect observed in RA mice was due to the downregulation of SPP1 and CXCL12 in chondrocytes, as evidenced by the restoration of angiogenesis upon SPP1 and CXCL12 treatment in vitro. In this regard, we developed a biodegradable scaffold loaded with SPP1 and CXCL12, which displayed a beneficial effect on angiogenesis and fracture repair in mice despite the presence of inflammation. Hence, these findings strongly suggest that the sustained release of SPP1 and CXCL12 represents an effective therapeutic approach to treat impaired angiogenesis and fracture nonunion under inflammatory conditions.
Collapse
Affiliation(s)
- Cuicui Wang
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA
| | - Jun Ying
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA ,grid.417400.60000 0004 1799 0055Department of Orthopaedic Surgery, the First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China ,grid.417400.60000 0004 1799 0055Institute of Orthopaedics and Traumatology, the First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaolei Nie
- grid.4367.60000 0001 2355 7002Department of Mechanical Engineering & Materials Science, School of Engineering, Washington University, St. Louis, MO USA
| | - Tianhong Zhou
- grid.4367.60000 0001 2355 7002Department of Mechanical Engineering & Materials Science, School of Engineering, Washington University, St. Louis, MO USA
| | - Ding Xiao
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA
| | - Gaurav Swarnkar
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA
| | - Yousef Abu-Amer
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA ,grid.415840.c0000 0004 0449 6533Shriners Hospital for Children, St. Louis, MO USA
| | - Jianjun Guan
- grid.4367.60000 0001 2355 7002Department of Mechanical Engineering & Materials Science, School of Engineering, Washington University, St. Louis, MO USA
| | - Jie Shen
- grid.4367.60000 0001 2355 7002Department of Orthopaedic Surgery, School of Medicine, Washington University, St. Louis, MO USA
| |
Collapse
|
29
|
Sun Y, Ge J, Tang W, Hong H, Liu D, Lin J. Hsa_circ_0045714 induced by eupatilin has a potential to promote fracture healing. Biofactors 2021; 47:376-385. [PMID: 33496034 DOI: 10.1002/biof.1707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 12/25/2020] [Indexed: 12/22/2022]
Abstract
It is thought that maintaining preosteoblast viability is constructive to fracture healing. Here, we explored the effects of eupatilin on preosteoblast and addressed the mechanism associated with hsa_circ_0045714. Blood specimens were collected from 32 patients with hand fracture or calcaneus fracture. MC3T3-E1 cells were treated with eupatilin. Small interfering-RNA was transfected into MC3T3-E1 cells. The ability of MC3T3-E1 cells to survive, proliferate, migrate, and express fracture-associated proteins was examined by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di- phenytetrazoliumromide (MTT), 5-bromodeoxyuridine (BrdU), 24-Transwell, Quantitative reverse transcription polymerase chain reaction (qRT-PCR), and Western blot. Hsa_circ_0045714 was detected by qRT-PCR. NF-κB and PI3K/AKT were evaluated by Western blot. Eupatilin enhanced the survival, proliferation, and migration of MC3T3-E1 cells. Cyclin D1, cyclin E, collagen II, aggrecan, and sulfated glycosaminoglycan (sGAG) were upregulated, while MMP-13 was downregulated in eupatilin-treated cells. Hsa_circ_0045714 was increased in patients with hand and calcaneus fractures with the time-lapse of surgical operation. In eupatilin-treated cells, Hsa_circ_0045714 was also elevated. However, the beneficial effects of eupatilin were weakened in hsa_circ_0045714-deficient cells. Molecularly, eupatilin-induced blockage of NF-κB and activation of PI3K/AKT were abrogated in hsa_circ_0045714-silenced cells. Our results confirmed the beneficial effects of eupatilin in preosteoblast, indicating eupatilin was a promising candidate for fracture healing.
Collapse
Affiliation(s)
- Yan Sun
- The First Ward of Trauma Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| | - Junbo Ge
- The First Ward of Trauma Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| | - Weiwei Tang
- Department of Tramatic Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| | - Huanyu Hong
- The First Ward of Trauma Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| | - Dong Liu
- Department of Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| | - Jiangtao Lin
- The First Ward of Trauma Orthopedics, Yantaishan Hospital, Yantai, Shandong, China
| |
Collapse
|
30
|
Coates BA, McKenzie JA, Yoneda S, Silva MJ. Interleukin-6 (IL-6) deficiency enhances intramembranous osteogenesis following stress fracture in mice. Bone 2021; 143:115737. [PMID: 33181349 PMCID: PMC8408837 DOI: 10.1016/j.bone.2020.115737] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 10/08/2020] [Accepted: 11/06/2020] [Indexed: 12/28/2022]
Abstract
Interleukin-6 (IL-6) is highly upregulated in response to skeletal injury, suggesting it plays a role in the inflammatory phase of fracture repair. However, the impact of IL-6 on successful repair remains incompletely defined. Therefore, we investigated the role of IL-6 in two models of fracture repair (full fracture and stress fracture) using 12-week old IL-6 global knockout mice (IL-6 KO) and wild type (WT) littermate controls. Callus morphology and mineral density 14 days after full femur fracture did not differ between IL-6 knockout mice and controls. In contrast, IL-6 KO mice had an enhanced bone response 7 days after ulnar stress fracture compared to WT, with increased total callus volume (p = 0.020) and callus bone volume (p = 0.045). IL-6 KO did not alter the recruitment of immune cells (Gr-1 or F4/80 positive) to the stress fracture callus. IL-6 KO also did not alter the number of osteoclasts in the stress fracture callus. Using RNA-seq, we identified differentially expressed genes in stress fracture vs. contralateral control ulnae, and observed that IL-6 KO resulted in only modest alterations to the gene expression response to stress fracture (SFx). Wnt1 was more highly upregulated in IL-6 KO SFx callus at both day 1 (fold change 12.5 in KO vs. 5.7 in WT) and day 3 (fold change 4.7 in KO vs. 1.9 in WT). Finally, using tibial compression to induce bone formation without bone injury, we found that IL-6 KO directly impacted osteoblast function, increasing the propensity for woven bone formation. In summary, we report that IL-6 knockout enhanced formation of callus and bone following stress fracture injury, likely through direct action on the osteoblast's ability to produce woven bone. This suggests a novel role of IL-6 as a suppressor of intramembranous bone formation.
Collapse
Affiliation(s)
- Brandon A Coates
- Department of Orthopaedic Surgery, Washington University in St. Louis, MO, United States of America; Department of Biomedical Engineering, Washington University in St. Louis, MO, United States of America.
| | - Jennifer A McKenzie
- Department of Orthopaedic Surgery, Washington University in St. Louis, MO, United States of America
| | - Susumu Yoneda
- Department of Orthopaedic Surgery, Washington University in St. Louis, MO, United States of America
| | - Matthew J Silva
- Department of Orthopaedic Surgery, Washington University in St. Louis, MO, United States of America; Department of Biomedical Engineering, Washington University in St. Louis, MO, United States of America
| |
Collapse
|
31
|
Ko FC, Sumner DR. How faithfully does intramembranous bone regeneration recapitulate embryonic skeletal development? Dev Dyn 2020; 250:377-392. [PMID: 32813296 DOI: 10.1002/dvdy.240] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 07/19/2020] [Accepted: 08/13/2020] [Indexed: 02/06/2023] Open
Abstract
Postnatal intramembranous bone regeneration plays an important role during a wide variety of musculoskeletal regeneration processes such as fracture healing, joint replacement and dental implant surgery, distraction osteogenesis, stress fracture healing, and repair of skeletal defects caused by trauma or resection of tumors. The molecular basis of intramembranous bone regeneration has been interrogated using rodent models of most of these conditions. These studies reveal that signaling pathways such as Wnt, TGFβ/BMP, FGF, VEGF, and Notch are invoked, reminiscent of embryonic development of membranous bone. Discoveries of several skeletal stem cell/progenitor populations using mouse genetic models also reveal the potential sources of postnatal intramembranous bone regeneration. The purpose of this review is to compare the underlying molecular signals and progenitor cells that characterize embryonic development of membranous bone and postnatal intramembranous bone regeneration.
Collapse
Affiliation(s)
- Frank C Ko
- Department of Cell & Molecular Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - D Rick Sumner
- Department of Cell & Molecular Medicine, Rush University Medical Center, Chicago, Illinois, USA
| |
Collapse
|
32
|
Marongiu G, Dolci A, Verona M, Capone A. The biology and treatment of acute long-bones diaphyseal fractures: Overview of the current options for bone healing enhancement. Bone Rep 2020; 12:100249. [PMID: 32025538 PMCID: PMC6997516 DOI: 10.1016/j.bonr.2020.100249] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 01/11/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023] Open
Abstract
Diaphyseal fractures represent a complex biological entity that could often end into impaired bone-healing, with delayed union and non-union occurring up to 10% of cases. The role of the modern orthopaedic surgeon is to optimize the fracture healing environment, recognize and eliminate possible interfering factors, and choose the best suited surgical fixation technique. The impaired reparative process after surgical intervention can be modulated with different surgical techniques, such as dynamization or exchange nailing after failed intramedullary nailing. Moreover, the mechanical stability of a nail can be improved through augmentation plating, bone grafting or external fixation techniques with satisfactory results. According to the "diamond concept", local therapies, such as osteoconductive scaffolds, bone growth factors, and osteogenic cells can be successfully applied in "polytherapy" for the enhancement of delayed union and non-union of long bones diaphyseal fractures. Moreover, systemic anti-osteoporosis anabolic drugs, such as teriparatide, have been proposed as off-label treatment for bone healing enhancement both in fresh complex shaft fractures and impaired unions, especially for fragility fractures. The article aims to review the biological and mechanical principles of failed reparative osteogenesis of diaphyseal fractures after surgical treatment. Moreover, the evidence about the modern non-surgical and pharmacological options for bone healing enhancement will discussed.
Collapse
Affiliation(s)
- Giuseppe Marongiu
- Orthopaedic and Trauma Clinic, Department of Surgical Sciences, University of Cagliari, Lungomare Poetto, Cagliari 09126, Italy
| | | | | | | |
Collapse
|
33
|
Yuan Y, Fang Y, Zhu L, Gu Y, Li L, Qian J, Zhao R, Zhang P, Li J, Zhang H, Yuan N, Zhang S, Ma Q, Wang J, Xu Y. Deterioration of hematopoietic autophagy is linked to osteoporosis. Aging Cell 2020; 19:e13114. [PMID: 32212304 PMCID: PMC7253060 DOI: 10.1111/acel.13114] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 11/24/2019] [Accepted: 01/25/2020] [Indexed: 12/18/2022] Open
Abstract
Hematopoietic disorders are known to increase the risk of complications such as osteoporosis. However, a direct link between hematopoietic cellular disorders and osteoporosis has been elusive. Here, we demonstrate that the deterioration of hematopoietic autophagy is coupled with osteoporosis in humans. With a conditional mouse model in which autophagy in the hematopoietic system is disrupted by deletion of the Atg7 gene, we show that incapacitating hematopoietic autophagy causes bone loss and perturbs osteocyte homeostasis. Induction of osteoporosis, either by ovariectomy, which blocks estrogen secretion, or by injection of ferric ammonium citrate to induce iron overload, causes dysfunction in the hematopoietic stem and progenitor cells (HSPCs) similar to that found in autophagy‐defective mice. Transcriptomic analysis of HSPCs suggests promotion of iron activity and inhibition of osteocyte differentiation and calcium metabolism by hematopoietic autophagy defect, while proteomic profiling of bone tissue proteins indicates disturbance of the extracellular matrix pathway that includes collagen family members. Finally, screening for expression of selected genes and an immunohistological assay identifies severe impairments in H vessels in the bone tissue, which results in disconnection of osteocytes from hematopoietic cells in the autophagy‐defective mice. We therefore propose that hematopoietic autophagy is required for the integrity of H vessels that bridge blood and bone cells and that its deterioration leads to osteoporosis.
Collapse
Affiliation(s)
- Ye Yuan
- Department of Orthopaedics the Second Affiliated Hospital of Soochow University Suzhou China
- Osteoporosis Institute of Soochow University Suzhou China
| | - Yixuan Fang
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Hematology Center Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Collaborative Innovation Center of Hematology Jiangsu Institute of Hematology Institute of Blood and Marrow Transplantation Institute of Neuroscience Key Laboratory of Stem Cells and Biomedical Materials of Jiangsu Province and Chinese Ministry of Science and Technology State Key Laboratory of Radiation Medicine and Radioprotection Soochow University School of Medicine Suzhou China
| | - Lingjiang Zhu
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
| | - Yue Gu
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
| | - Lei Li
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
| | - Jiawei Qian
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
| | - Ruijin Zhao
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
| | - Peng Zhang
- Department of Orthopaedics the Second Affiliated Hospital of Soochow University Suzhou China
- Osteoporosis Institute of Soochow University Suzhou China
| | - Jian Li
- Department of Orthopaedics the Second Affiliated Hospital of Soochow University Suzhou China
- Osteoporosis Institute of Soochow University Suzhou China
| | - Hui Zhang
- Department of Orthopaedics the Second Affiliated Hospital of Soochow University Suzhou China
- Osteoporosis Institute of Soochow University Suzhou China
| | - Na Yuan
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Hematology Center Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Collaborative Innovation Center of Hematology Jiangsu Institute of Hematology Institute of Blood and Marrow Transplantation Institute of Neuroscience Key Laboratory of Stem Cells and Biomedical Materials of Jiangsu Province and Chinese Ministry of Science and Technology State Key Laboratory of Radiation Medicine and Radioprotection Soochow University School of Medicine Suzhou China
| | - Suping Zhang
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Hematology Center Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Collaborative Innovation Center of Hematology Jiangsu Institute of Hematology Institute of Blood and Marrow Transplantation Institute of Neuroscience Key Laboratory of Stem Cells and Biomedical Materials of Jiangsu Province and Chinese Ministry of Science and Technology State Key Laboratory of Radiation Medicine and Radioprotection Soochow University School of Medicine Suzhou China
| | - Quanhong Ma
- Collaborative Innovation Center of Hematology Jiangsu Institute of Hematology Institute of Blood and Marrow Transplantation Institute of Neuroscience Key Laboratory of Stem Cells and Biomedical Materials of Jiangsu Province and Chinese Ministry of Science and Technology State Key Laboratory of Radiation Medicine and Radioprotection Soochow University School of Medicine Suzhou China
| | - Jianrong Wang
- Research Center for Non‐medical Healthcare of Soochow University & Beijing Yaozhongtang Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Hematology Center Cyrus Tang Medical Institute Soochow University School of Medicine Suzhou China
- Collaborative Innovation Center of Hematology Jiangsu Institute of Hematology Institute of Blood and Marrow Transplantation Institute of Neuroscience Key Laboratory of Stem Cells and Biomedical Materials of Jiangsu Province and Chinese Ministry of Science and Technology State Key Laboratory of Radiation Medicine and Radioprotection Soochow University School of Medicine Suzhou China
| | - Youjia Xu
- Department of Orthopaedics the Second Affiliated Hospital of Soochow University Suzhou China
- Osteoporosis Institute of Soochow University Suzhou China
| |
Collapse
|
34
|
KATİCA M, TEPEKOY F. The effect of Calcitriol 1,25 (OH)2 - D3 on osteoblast-like cell proliferation during in vitro cultivation. MEHMET AKIF ERSOY ÜNIVERSITESI VETERINER FAKÜLTESI DERGISI 2020. [DOI: 10.24880/maeuvfd.653000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022] Open
|
35
|
Xu T, Luo Y, Wang J, Zhang N, Gu C, Li L, Qian D, Cai W, Fan J, Yin G. Exosomal miRNA-128-3p from mesenchymal stem cells of aged rats regulates osteogenesis and bone fracture healing by targeting Smad5. J Nanobiotechnology 2020; 18:47. [PMID: 32178675 PMCID: PMC7077029 DOI: 10.1186/s12951-020-00601-w] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 03/05/2020] [Indexed: 02/08/2023] Open
Abstract
Transplantation of mesenchymal stem cells (MSCs) has been considered an effective therapeutic treatment for a variety of diseases including bone fracture. However, there are associated complications along with MSCs transplantation. There is evidence to show that exosomes (Exos) derived from MSCs exert a similar paracrine function. In addition, repair capabilities of MSCs decline with age. Hence, this study aims to confirm whether the Exos protective function on osteogenic differentiation and fracture healing from aged MSCs was attenuated. This information was used in order to investigate the underlying mechanism. MSCs were successfully isolated and identified from young and aged rats, and Exos were then obtained. Aged-Exos exhibited significantly attenuated effects on MSCs osteogenic differentiation in vitro and facture healing in vivo. Using miRNA array analysis, it was shown that miR-128-3p was markedly upregulated in Aged-Exos. In vitro experiments confirmed that Smad5 is a direct downstream target of miR-128-3p, and was inhibited by overexpressed miR-128-3p. A series gain- and loss- function experiment indicated that miR-128-3P serves a suppressor role in the process of fracture healing. Furthermore, effects caused by miR-128-3P mimic/inhibitor were reversed by the application of Smad5/siSmad5. Taken together, these results suggest that the therapeutic effects of MSCs-derived Exos may vary according to differential expression of miRNAs. Exosomal miR-128-3P antagomir may act as a promising therapeutic strategy for bone fracture healing, especially for the elderly.
Collapse
Affiliation(s)
- Tao Xu
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Yongjun Luo
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Jiaxing Wang
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Ning Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Changjiang Gu
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Linwei Li
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Dingfei Qian
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China
| | - Weihua Cai
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
| | - Jin Fan
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
| | - Guoyong Yin
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, China.
| |
Collapse
|
36
|
Green AC, Lath D, Hudson K, Walkley B, Down JM, Owen R, Evans HR, Paton-Hough J, Reilly GC, Lawson MA, Chantry AD. TGFβ Inhibition Stimulates Collagen Maturation to Enhance Bone Repair and Fracture Resistance in a Murine Myeloma Model. J Bone Miner Res 2019; 34:2311-2326. [PMID: 31442332 DOI: 10.1002/jbmr.3859] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/09/2019] [Accepted: 08/17/2019] [Indexed: 12/12/2022]
Abstract
Multiple myeloma is a plasma cell malignancy that causes debilitating bone disease and fractures, in which TGFβ plays a central role. Current treatments do not repair existing damage and fractures remain a common occurrence. We developed a novel low tumor phase murine model mimicking the plateau phase in patients as we hypothesized this would be an ideal time to treat with a bone anabolic. Using in vivo μCT we show substantial and rapid bone lesion repair (and prevention) driven by SD-208 (TGFβ receptor I kinase inhibitor) and chemotherapy (bortezomib and lenalidomide) in mice with human U266-GFP-luc myeloma. We discovered that lesion repair occurred via an intramembranous fracture repair-like mechanism and that SD-208 enhanced collagen matrix maturation to significantly improve fracture resistance. Lesion healing was associated with VEGFA expression in woven bone, reduced osteocyte-derived PTHrP, increased osteoblasts, decreased osteoclasts, and lower serum tartrate-resistant acid phosphatase 5b (TRACP-5b). SD-208 also completely prevented bone lesion development in mice with aggressive JJN3 tumors, and was more effective than an anti-TGFβ neutralizing antibody (1D11). We also discovered that SD-208 promoted osteoblastic differentiation (and overcame the TGFβ-induced block in osteoblastogenesis) in myeloma patient bone marrow stromal cells in vitro, comparable to normal donors. The improved bone quality and fracture-resistance with SD-208 provides incentive for clinical translation to improve myeloma patient quality of life by reducing fracture risk and fatality. © 2019 American Society for Bone and Mineral Research.
Collapse
Affiliation(s)
- Alanna C Green
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Darren Lath
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Katie Hudson
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Brant Walkley
- Department of Materials Science and Engineering, The University of Sheffield, Sheffield, UK
| | - Jennifer M Down
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Robert Owen
- INSIGNEO Institute of In Silico Medicine, Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
| | - Holly R Evans
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Julia Paton-Hough
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Gwendolen C Reilly
- INSIGNEO Institute of In Silico Medicine, Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
| | - Michelle A Lawson
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK
| | - Andrew D Chantry
- Sheffield Myeloma Research Team, Department of Oncology and Metabolism, Medical School, University of Sheffield, Sheffield, UK.,Mellanby Centre for Bone Research, University of Sheffield Medical School, University of Sheffield, Sheffield, UK.,Department of Haematology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Sheffield, UK
| |
Collapse
|
37
|
Stefanowski J, Lang A, Rauch A, Aulich L, Köhler M, Fiedler AF, Buttgereit F, Schmidt-Bleek K, Duda GN, Gaber T, Niesner RA, Hauser AE. Spatial Distribution of Macrophages During Callus Formation and Maturation Reveals Close Crosstalk Between Macrophages and Newly Forming Vessels. Front Immunol 2019; 10:2588. [PMID: 31956322 PMCID: PMC6953593 DOI: 10.3389/fimmu.2019.02588] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 10/18/2019] [Indexed: 01/15/2023] Open
Abstract
Macrophages are essential players in the process of fracture healing, acting by remodeling of the extracellular matrix and enabling vascularization. Whilst activated macrophages of M1-like phenotype are present in the initial pro-inflammatory phase of hours to days of fracture healing, an anti-inflammatory M2-like macrophage phenotype is supposed to be crucial for the induction of downstream cascades of healing, especially the initiation of vascularization. In a mouse-osteotomy model, we provide a comprehensive characterization of vessel (CD31+, Emcn+) and macrophage phenotypes (F4/80, CD206, CD80, Mac-2) during the process of fracture healing. To this end, we phenotype the phases of vascular regeneration-the expansion phase (d1-d7 after injury) and the remodeling phase of the endothelial network, until tissue integrity is restored (d14-d21 after injury). Vessels which appear during the bone formation process resemble type H endothelium (CD31hiEmcnhi), and are closely connected to osteoprogenitors (Runx2+, Osx+) and F4/80+ macrophages. M1-like macrophages are present in the initial phase of vascularization until day 3 post osteotomy, but they are rare during later regeneration phases. M2-like macrophages localize mainly extramedullary, and CD206+ macrophages are found to express Mac-2+ during the expansion phase. VEGFA expression is initiated by CD80+ cells, including F4/80+ macrophages, until day 3, while subsequently osteoblasts and chondrocytes are main contributors to VEGFA production at the fracture site. Using Longitudinal Intravital Microendoscopy of the Bone (LIMB) we observe changes in the motility and organization of CX3CR1+ cells, which infiltrate the injury site after an osteotomy. A transient accumulation, resulting in spatial polarization of both, endothelial cells and macrophages, in regions distal to the fracture site, is evident. Immunofluorescence histology followed by histocytometric analysis reveals that F4/80+CX3CR1+ myeloid cells precede vascularization.
Collapse
Affiliation(s)
- Jonathan Stefanowski
- Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Annemarie Lang
- Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Ariana Rauch
- German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Linus Aulich
- German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Markus Köhler
- German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Alexander F Fiedler
- German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Frank Buttgereit
- Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Katharina Schmidt-Bleek
- Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Georg N Duda
- Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Timo Gaber
- Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Raluca A Niesner
- German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany.,Dynamic and Functional in vivo Imaging, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Anja E Hauser
- Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| |
Collapse
|